[INFO] fetching crate closures 0.1.2...
[INFO] testing closures-0.1.2 against 1.75.0 for beta-1.76-1
[INFO] extracting crate closures 0.1.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate closures 0.1.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate closures 0.1.2
[INFO] finished tweaking crates.io crate closures 0.1.2
[INFO] tweaked toml for crates.io crate closures 0.1.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e1185a92516996232f83a7ce819d1744f69964e253a55fbcb4cf85e92f0d231
[INFO] running `Command { std: "docker" "start" "-a" "0e1185a92516996232f83a7ce819d1744f69964e253a55fbcb4cf85e92f0d231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e1185a92516996232f83a7ce819d1744f69964e253a55fbcb4cf85e92f0d231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e1185a92516996232f83a7ce819d1744f69964e253a55fbcb4cf85e92f0d231", kill_on_drop: false }`
[INFO] [stdout] 0e1185a92516996232f83a7ce819d1744f69964e253a55fbcb4cf85e92f0d231
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb5a36d74f6fb0dcd8d4fce133af7bda43ab2b0abea3cec225bc325a574d9030
[INFO] running `Command { std: "docker" "start" "-a" "eb5a36d74f6fb0dcd8d4fce133af7bda43ab2b0abea3cec225bc325a574d9030", kill_on_drop: false }`
[INFO] [stderr]    Compiling closures v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(unboxed_closures,fn_traits)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(unboxed_closures,fn_traits)]
[INFO] [stdout]   |                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `closures` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "eb5a36d74f6fb0dcd8d4fce133af7bda43ab2b0abea3cec225bc325a574d9030", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb5a36d74f6fb0dcd8d4fce133af7bda43ab2b0abea3cec225bc325a574d9030", kill_on_drop: false }`
[INFO] [stdout] eb5a36d74f6fb0dcd8d4fce133af7bda43ab2b0abea3cec225bc325a574d9030
